Casing connection



Oct. l4, l930. B. CLARK CASING CQNNECTION Filed April 26, 1929 5 Sheets-Sheet 1 Inventor A tiomey Oct. 14, 1930. B. .CLARK CASING CONNECTION Filed April 26, 1929 3 Sheets-Sheet 2 Oct. 14, 1930. a CLARK Filed April 26, 1929 1 HM". I:

3 Sheets-Sheet 3 Patented Get. 14, 1930 @TATEF FATENT OFFICE BILLIE CLARK, OF WINFIELD, KANSAS CASING CONNECTION Application filed April 26, 1929. Serial No. 358,283.

My present invention pertains to casing is formed a bore 8, of angular cross secconnections or pipe fishing devices; and it tion and closed at its upper end and open contemplates the provision of such a device at its lower end and in communication possessed of the practical advantages herewith the said bore 8 is a slot 9 and a res inafter ascribed to it over analogous decess 10, Figure 4E. Pivoted at 10 v in the revices at present'known in the art. cess lO'is a swingable latch member 12 sub- To the attainment of the foregoing the ject to the influence of a retractile spring 13, invention consists in the improvement as which spring 13 is connected at all times to hereinafter described and definitely claimed. the latch member 12 but is adapted to be In In the accompanying drawings forming connected either to an upper hook 13 or part of this specification: a lower hook 13 the first of said con- Figure 1 is a side elevation of the upper nections being provided in order to enable por;ion of the preferred embodiment of my the spring 13 to maintain the latch member invention. 12 in the position illustrated in Figure 1-,

Figure 2 1s a side elevat1on of the interand the second ofsald connections bemg remediate portion of sald embodiment, sorted to when t isdeslred to use the spring Fi "ure 3 is a side elevation of the lower 13 for the ieldable maintenance of the g y end portion of said embodiment. latch member 12 in upright DOSliJlOH,

Figure 1 is a section of the upper portion 1V hile the bore 8 is referred to as of angular 30 of the preferred embodiment of the device. cross section, I deem it proper to say that more Figure 5 is a sectlon of the intermediate correctly the cross section of the bore 8 is of portion of the embodiment. general elliptical form.

F1gure 6 is a section of the lower end por- The lower or gulde member 2 of the devlce tion of the said embodlment. 1s chambered or bored at 1 1, Figure 6, and 1s 25 Figure 7 is an enlarged transverse section preferably provided with a. longitudinal centaken on the plane indicated by the line tral aperture 15 extending from said chamber 7 of Figure 4 looking downwardly. V 14 t0 the lower rounded end of the member.

It will be noted that Figures 1, 2 and 3 The body or intermediate member 1, Figdownwardly in the sequence indicated ures 2 to 6, is provided with a bore 20 of illustrate in elevation; the complete device, square form in cross section which extends while Figures 1, 5 and 6 read downwardly from the upper end of the said body 1 to the in the sequence indicated illustrate the comlower intermediate point 20*, Figure 5, and is plete device in section. slightly larger in cross section than the bore Similar numerals of reference designate 8 of member l and is merged at its lower end corresponding parts in allthe views of the into a small bore 21, Figures 5 and 6. Cardrawings. i v ried by the said body 1 are three pairs of Among other elements the preferred em dogs. the said pairs of dogs or rather sets of bodiment of my invention comprises a body dogs being spaced apart as shown in Figures 1 with wrench holds 1 adjacentto its lower 1 and 2. and alsoin Figures 4 and 5. There 40 end, Figure 3, a lower guide member 2, are tour toothed dogs 32 in'the upper sets,

F igures 3 and 6,.rounded at its lower end 3 and said dogs 32 are slidable vertically in and an upper or latch socket member 4. recesses 32 in the body 1 and on flexible The member 2 is threadedly or otherwise strips 33* which are secured at their upper suitablyv connected in detachable manner at ends in. the body 1 and have their lower por- 4? to the lower end of the body 1 Figure 6. tions arranged loosely the inner side of re- The latch socket member 1 comprises a body taining members 34 The retaining memof :eneral cylindrical form provided with here 341* are connected to the body 1 bv screws wrench holes 6 and also with the conven- 35,andthe said screws erttend loosely through tional threaded end-extension 7, Figures 1 the strips 33* and support expansion springs and 4, In. the said body of the member 6 whi h by pressing outwardly against the strips 36 serve to yieldingly hold the dogs 32 in outwardly extended position.

As appears in Figure 4: the lower end portions of the strips 33 extend below the retaining members or blocks 3st for a purpose to be hereinafter set forth.

The intermediate dogs of toothed type and four in number are designated by 37, Figures 2 and 5. These dogs 37 are slidable vertically on flexible strips 38 secured at their upper ends in the body 1, and the lower portions of the said strips 38 are disposed at the inner side of retaining members 39, which are connected to the body 1 by screws -10 on which. are expansion springs 41, the province of which is to press the strips 38 outwardly and thereby yieldingly maintain the dogs 37 in outwardly GT-IiZEHClOCl positions. The lower ends of the strips 38 are disposed in the up per ends of shoes 42, said shoes 42 being normally arranged as illustrated in Figure 5, and being pivotally connected at 4:3 to the body 1. which is recessed at e'sl for the play of the shoes 42 of which four are employed.

There are four of the toothed dog complementary to the body 1, Figures 2 and These dogs 15 constitute the lowermost set of dogs and they are associated with lever members 16 pivoted at 47 to the body 1 and movable in slots $8 of said body 1. The said lever members 46 are provided with inc ined ribs 49 of dove tail cross section with which ribs the dogs 45 are engaged. and on wl sch ribs the dogs 45 are slidably arranged so that the said dogs 15 are capab e of vertical movement relative to the lever members do.

At 49* in the body 1 is removably arranged diametrical headed key which is backed by and normally retained in position by a cap plate 49 detachably secured by screws to the body 1. This construction is clearly brought out in Figure 5.

At 50, Figures 4 and 5, is a plunger movable in the body 1 and the members 2 and a. Said plunger 50 has a slot 51 which receives the key 49*, Figure 5, so that the said key limits the endwise movement of the plunger 50. The said plunger 50 is also provided with four cam projections 52, movable in slots 53 of the body 1 and des gned by co-operation with the lower ends of the strips 32* to retract or move inwardly the dogs 32, Figures 1 and 1. At its lower end the maj or portion of the plunger 50, which portion is prefen ably of square cross section, the plunger is pro dried with a depending rod 53 on which is a nut or other abutment between which abutment and the abutment 55 in the body 1 is interposed an expansion spring Figure 6. Under normal conditions the said spring 56 serves to yieldingly hold the plunger 50 against upward movement. lllaniiestlv when the plunger 50 is in its lowermost position, the swingable members 46 will be maintained against inward movement as will be readily understood from Figure 5. When however, the plunger 50 is moved upwardly from the position shown in Figure 5 the lever members $6 will be free to swing inwardly and will carry with them the lowermost dogs 45.

The upper portion 57 of the plunger 50 is reduced and is disposed in the bore 8 of the member 4, and it will be readily noticed that the said reduced portion 57 is provided at 58 with a slot for the reception of the latch 12. It will also be readily understood that the said plunger portion 57 corresponds in configuration with the cross section of the bore 8.

When the plunger 50 is in its uppermost position, the dogs 15 will be free to move inwardly relative to the body 1. The novel connection is then ready to be run in pipes, the dogs 32 being held in their inward position while the dogs 37 are free to be pushed inwardly. When the connection runs through the upper section of a parted pipe, the shoes 42 leave the lower end of the upper pipe section, and the dogs 37 are forced outwardly, thereby causing the dogs 37 to take hold of the inside of the pipe, said dogs 37 slipping upwardly on the strips 38 and seating against the body 1. The inclination of the seats complementary to the dogs 37 forces the said dogs 37 outwardly as the dogs slip upwardly relatively to the seats. When the dogs 37 take hold, the body 1 stops and the weight of drilling tools forces the plunger 50 downwardly which brings about release of the dogs 32 and they then take hold of the inside of the pipes. If the body 1 for any reason starts to work downwardly as the dogs 32 are pushed outwardly, the plunger 50 being seated in its lowermost position will force the dogs 45 outwardly into position to enter the upper portion of the lower section or the parted pipes. It will also be understood that when the plunger 50 is driven downwardly, the latch socket member 4 which is to be run on drilling tools in actual practice, will be released from the connection by virtue of the spring 13 lifting the latch 2 out or the slot 58 in the plunger 50. The latch socket member 1 can then be withdrawn from the hole which will prevent stripping jobs by having tools and latch socket member attached. It will also be understood that with the parts positioned as last stated, the con nection has taken proper hold in the upper section of a parted pipe and is hold up by said section only. The plunger 50 having been moved downwardly as before stated has shoved the dogs -15 outwardly, and is now ready to enter the upper portion of the lower section of parted pipes. At such time the connection has taken proper hold in both the lower and upper sections of parted pipes with the result that through the medium of the connection the said sections of pipes are connected together. The spring 13 is adapted to be connected to" either the lower fastening 13 or the upper fastener 13 shown in Figure 4. When the spring 13 is connected to the upper fastener, the latch socket member 4 isready to be set over the plunger 50, and when this is done the latch 12 falls through the slot 58 in the plunger 50. The connection is then ready to be picked out of the pipe, and in this connection it will be under'stood that the connection may be removed from the pipe by pulling u'pwardly on the plunger if it becomes necessary to rip off pipes. When theplunger 50 is picked'u-pwardly to remove the connection from a hole, all of the dogs swing inwardly and are In theorem and consequently are prevented fromcatching the inside wall of the pipe the hole. V

In other words the dogs are in the same position as when the connection is beinglo'w ered in a hole.

When the dogs 32 engage the upper section of a parted pipe the connection will be pre vented from working" downwardly. Again when the connection is being run in pipe, if the connection stops at any place in pipe, such as might be caused by encountering a dented place in the pipe, the weight of the drilling stein will force the plunger 50 downwardly which will enable the springs eomplementary to the dogs 32 to force said dogs oiit'wardly" and cause them to take proper hold, and in that way revent the connection from dropping'in the ole,

I have" entered into a detailed description of the construction and relative arrangement of the parts embraced in the preferred em bodiment' of invention in order to" impart while the connection is being removed from a full, clear and exact understanding of'the said embodiment;

I donot desire, however, to be understood as limiting) myself to the eons'truc'tion and relative arrangement of parts as disclosed, my invention being defined by my appended claims within the scope of which modifications may be" made without departure from my invention.

The spring 13 is hoolied to fastener" 13, Figure 1, for running the casing connection in a hole, while the said spring 13- is hooked to the fastener 13* a'sshown in Figure 1 to remove theyconnectionfrom a hole;

- Having thus described the invention, what 0 I claim as newand desire to secure by Letters Patents is 3- i y 1 In a device for the purpose described in combination, a body, setsoi dogs carried by the body and movable relatively C thereto, a plunger movable relatively to the body and sets of dogs, one set of dogs being free to move] inwardly when the plunger is moved in one direction and being movable outwardly when the plun er is moved in the opposite direction, and canrinearis complementary' to the plunger and another setof dogs for retractingthe latter on movement of theplunger in the first of said directions.

2'. In a device for the purpose described and in combination, a body, sets of dogs carried by the body and movable relatively thereto, a plunger movable relatively to the body and sets of dogs, one set of dogs being free to move inwardly when the plunger is moved in one direction and being movable outwardly when the plunger is moved in the opposite direction, cam means complementary to the plunger and the other set of dogs forretracting the latter on movement of the plunger in the first of said directions, dogs spring impelled outwardly and carried by the body between the other two sets of dogs, and shoes pivoted at one end to the body, and having their opposite ends connected with the last named dogs.

3'. In a'device for the purpose describedand in combination, a body, sets of dogs carried by the body and movable relatively thereto, a plunger movable relatively to the body "and sets of dogs, one set of dogs being free to move inwardly when the plunger is moved in one direction and being movable outwardly when the plunger is moved in the opposite direction, cam means complementary to the plunger and the other set of dogs for retracting the latter on movement ofvthe plunger in the first of said directions, dogs spring impelled outwardly and carried by the body, shoes pivoted at one end to the body and movableradially withthe last named dogs, and a latch socket member detachably connected to the plunger-and through the plunger with the body; 7 v

4.- In a device for the purpose described and in combination, a body having dogs and dog controlling means, in combination with a lower guide member, an upper member separable from the body, a latch carried by the ripper member, a plunger movable in and connected to the body and movable in the upper member and adapted to receive the latch,and means for yieldingly holding'said plunger against endw'ise movement;

5. In a device for the purpose described, and in combination, body having dogs, and dog controlling'means, incombination with a lower guide member, an upper member separable from the body, a latch carried by the upper member, a plunger movable in and "connected to the body aiidmovable in the upper memb'er'gand adapted to receive the latch and means foryieldingly holding said plunger against endwise' movement; the lower guide member being chambered, and" the said means including a'rod on the plunger and: in said chamber, and a spring on the rod and in the chamber" for resisting" movement of the "rod in one direction.

6-. In a device for the purpose described, and combination, a body having dogs, and

dog controlling means, an upper member separable from the body, a plunger movable in and connected to the body and movable in the upper member, and adapted to receive the latch; a latch in the upper member for the detachable connection of the same to the plunger, and means for retaining the plungerin the body while permitting of endwise movement of the plunger in said member.

7. In a device for the purpose described, and in combination, a body having dogs, and dog controlling means, an upper member, a plunger movable in the body and upper member. a latch in the upper member for the detachable connection. of the same to the plunger, and means for retaining the plunger in the body while permitting of endwise movement of the plunger in said member the plunger being provided with a pendent rod and a spring being interposed between an abutment on said rod and the lower portion of the body.

8. A device for the purpose described, comprising a body, an upper member separable from the body, sets of dogs carried by the body, a latch carried by the upper member, a plunger movable in and connected to the body and movable in the upper member and arranged to receive and cooperate with the said latch, means for yieldingly resisting upward movement of the plunger in the body and member, and a key detachably secured in the body and disposed in a slot in the said plunger.

9. A device for the purpose described. comprising a body, an upper member, sets of dogs carried by the body, a latch carried by the upper member, a plunger movable in the body and the upper member and arranged to cooperate with the said latch, means for yieldingly resisting upward movement of the plunger in the body and member, and a key detachably secured in the body and disposed in a slot in. the plunger; the said means for yieldingly resisting endwise movement of the plunger including a rod on the plunger and pendent therefrom, and a spring on the rod and interposed between an abutment thereof and the lower portion of the body, and the body being equipped with a chambered guide member receiving the said rod and spring and detachably connected to the lower end of the body.

10. In a device for the purpose described, and in combination, a body, dogs swingably connected with the body, said dogs having extended strips, and said dogs being spring influenced whereby they are yieldingly maintained in extended position, and a plunger movable endwise relatively to the body and having cam means arranged to cooperate with the said strips of the said dogs for the retraction of the dogs.

11. In a device for the purpose described, and in combination, a body, dogs swingably connected with the body, said dogs having said strips, and said dogs being spring intluenced whereby they are yieldingly maintained in extended position, and a plunger movable endwise relatively to the body and having cam means arranged to cooperate with the said strips of the said dogs "for the retraction of the dogs; the said dogs being slidable as well as swin able relatively to the body and being arranged in certain position to engage and be backed by the body.

12. In a device for the purpose described, and in combination, a body with recesses, the inner walls of which are inclined, flexible strips disposed in said recesses and connected at their upper ends with the body, dogs slidable on said strips, spring means for impelling the lower portions of the strips outwardly. means carried by the body for limiting the outward movement of the strips, and a. plunger movable in the body and relatively thereto. and having cam means for cooperating with the lower portion of said strip for the retraction of said dogs.

13. In a device for the purpose described, and in combination, a body, said body having recesses in its exterior, spring strips arranged in said recesses and connected at their upper ends to the body, dogs slidable in said recesses and on said strips, spring means for impelling the lower portions of the strips outwardly, means carried by the body for limiting the outward movement of the lower portions of the strips, and shoes exteriorly of the body and connected at their lower ends thereto and having their upper ends engaged with and adapted to move the lower portions of the strips.

14. In a device for the purpose described, and in combination, a body having longitudinal slots, a plunger movable endwise in and relatively to said body, lever members pivoted to the body and arranged in said slots and having inclined ribs, and dogs held to and slidable on said ribs of the lever members. said lever members movable outwardly by the plunger and adapted to swing inwardly when released by the plunger. I

15. In a device for the purpose described and in combination, a body. said body exteriorly recessed, spring pressed dogs carried by the body and movable in said recesses, and longitudinally disposed controlling shoes, said shoes pivotally connected with the body and connected with the dogs.

16. In a device for the purpose described and in combination, a body equipped with dogs, a member superposed on and separable from the body and equipped with a latch, a plunger movable relatively to the body and enga ged by said latch, and means cooperating with the plunger and the body for yieldingly resisting endwise movement of the plunger in one direction.

17. In a device for the purpose described and in combination, a body, a member superposed on and separable from the body and equipped with a latch a plunger engaged by said latch and movable in and relatively to the body and having cam means, a set of dogs carried by the body and controllable by the plunger, a second set of dogs carried by the body and controllable by the cam means of the plunger, a third set of dogs carried by the body and spring impelled outwardly, and movable shoes carried by the body and engaged With the last named set of dogs for the control of the latter.

In testimony whereof I aifix my signature.

BILLIE CLARK. 

